diff options
| author | Oded Gabbay <oded.gabbay@gmail.com> | 2016-12-28 13:38:35 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2017-01-14 16:47:10 -0500 |
| commit | 8c36e99f211104fd7dcbf0669a35a47ce5e154f5 (patch) | |
| tree | 51ed5633ec7e0efa7015dbd88358d919b3ae095b | |
| parent | 6569c0d3252d482a01325f7b87b6ebe4e1ab07fd (diff) | |
armv8: release slave cores from CPU_RELEASE_ADDR
When using ARMv8 with ARMV8_SPIN_TABLE=y, we want the slave cores to
wait on spin_table_cpu_release_addr, until the Linux kernel will "wake" them
by writing to that location. The address of spin_table_cpu_release_addr is
transferred to the kernel using the device tree that is updated by
spin_table_update_dt().
However, if we also use SPL, then the slave cores are stuck at
CPU_RELEASE_ADDR instead and as a result, never wake up.
This patch releases the slave cores by writing spl_image->entry_point to
CPU_RELEASE_ADDR location before the end of the SPL code
(at jump_to_image_no_args()).
That way, the slave cores will start to execute the u-boot and will get to
the spin-table code and wait on the correct address
(spin_table_cpu_release_addr).
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
| -rw-r--r-- | common/spl/spl.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/common/spl/spl.c b/common/spl/spl.c index d3a4ff62e5..8fb8da4525 100644 --- a/common/spl/spl.c +++ b/common/spl/spl.c @@ -167,6 +167,14 @@ __weak void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image) (image_entry_noargs_t)spl_image->entry_point; debug("image entry point: 0x%lX\n", spl_image->entry_point); +#if defined(CONFIG_ARMV8_SPIN_TABLE) && defined(CONFIG_ARMV8_MULTIENTRY) + /* + * Release all slave cores from CPU_RELEASE_ADDR so they could + * arrive to the spin-table code in start.S of the u-boot + */ + *(ulong *)CPU_RELEASE_ADDR = (ulong)spl_image->entry_point; +#endif + image_entry(); } |